Rachel ClunBusiness reporterGetty ImagesPeople buying cryptocurrency in the UK now need to share their account details or face penalties, in changes that came into effect on 1 January. The move by the UK's tax body is designed to ensure they pay all relevant tax on buying and selling crypto, including capital gains tax.HMRC will begin automatically collecting information on all users of cryptocurrency exchanges - which are effectively the industry's banks - in a bid to start collecting tens of m...